Hi darb, news good...I sent at the beginning of the week, Ooooops, forgot track for you.
Tomorrow morning I'll send you via pm...yes, my brain is full
Hi Roberto
just tested the DPS-SDA with a fresh Subbu Dac V3 (WM8804+ES9023)
amaizing good ! perfect combinaison
just tested the DPS-SDA with a fresh Subbu Dac V3 (WM8804+ES9023)
An externally hosted image should be here but it was not working when we last tested it.
amaizing good ! perfect combinaison
Hi Fabrice,
thanks for shared, eheh I have no doubt about this.
You must see the new Dual Mono I ordered, with which types of components arrive,
I am very happy when others are.
You put a sheet of insulating material under the regulators? you are crazy if you placed sda, without
Just my curiosity,not see caps on the PBTU board,you have changed with smd at bottom?
How much does Subbu dac?
------------------------
I also have curiosity of listening impressions from Darb, becouse has powered the SDA's with DPS-500/DA ... @ 56V
thanks for shared, eheh I have no doubt about this.
You must see the new Dual Mono I ordered, with which types of components arrive,
I am very happy when others are.
You put a sheet of insulating material under the regulators? you are crazy if you placed sda, without
Just my curiosity,not see caps on the PBTU board,you have changed with smd at bottom?
How much does Subbu dac?
------------------------
I also have curiosity of listening impressions from Darb, becouse has powered the SDA's with DPS-500/DA ... @ 56V
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Hello ! how was the week end ? productive!
well after I tested teh Subbu DAC with the SDA, I decided to start some testing with VSSA
problem is that I m struggling on finding the right balance between Bias current in the VAS and DC offset, but ok, nothing to do with the DPS400
so stay tuned
Roberto, FYI, I ve soldered the murata caps directly on the pin of the Elna, on the solder side and the cost of subbu dac was around 70€ (pcb+components+psu) but it is a GB which is now ended.
well after I tested teh Subbu DAC with the SDA, I decided to start some testing with VSSA
An externally hosted image should be here but it was not working when we last tested it.
problem is that I m struggling on finding the right balance between Bias current in the VAS and DC offset, but ok, nothing to do with the DPS400
so stay tuned
Roberto, FYI, I ve soldered the murata caps directly on the pin of the Elna, on the solder side
and the cost of subbu dac was around 70€ (pcb+components+psu) but it is a GB which is now ended.
I'm very curious..
you are right, on this heatsink (comming from one channel of a vintage accuphase 303X) which is temporary, the heatsink comes to 41°C without load/signal.
so yes it seems the vssa gets hot
I hope to do som listening tomorow morning. This took a lot of time to prepare this equipement, and to calibrate it ...
Yes Roberto you are right I have 4 DPS and then I m planing to have 2 DPS for each channel (Left / Right). one DPS is for the 2 woofers (8') and the second DPS is for the Compression and the tweeter. This should be ok.
But for the time being, I m just "testing" all of that in basic stereo mode with a single DPS. That is not optimal, but still it delivers a stuning result.
stay tuned
so yes it seems the vssa gets hot
I hope to do som listening tomorow morning. This took a lot of time to prepare this equipement, and to calibrate it ...
Yes Roberto you are right I have 4 DPS and then I m planing to have 2 DPS for each channel (Left / Right). one DPS is for the 2 woofers (8') and the second DPS is for the Compression and the tweeter. This should be ok
.But for the time being, I m just "testing" all of that in basic stereo mode with a single DPS
. That is not optimal, but still it delivers a stuning result.stay tuned
Hello Folks;
this is a nice shining day here on the east side of the atlantics
this is the DPS+VSSA "in situ" this morning
The first very good news , is that I cannot here any sort of noise in the tweet and comp. the DPS is clean and the PSSR of the VSSA is good. no need for additional coil or whatso ever fancy caps. no zzzz or chhh or fffff
this is the first 30' of sound so this is not possible to give any judgment of any kind, either for the combi VSSA-DPS or for any comparaison between SDA and VSSA if anyone wanted that, sorry
let me say the music is just Good, so good. Well, very conventional I d say. soft, cool, nice, that doesnt rock as the first try with the DPS-SDA, something different, here. bass very good, but not as tight and powerfull as SDS (yet?).
Voice/mids less brillant, more soft but sill good details.
well. I must stop otherwise I would start judging things which cannot at this stage
for those questioning VSSA with DPS, I feel very very good with this combinaison (compared to my DIY trafo 1200VA classA/B ). Still the 1000uF onboarded on the VSSA PCB might have a serious impact on sound.
for those questioning SDA vs classA/B, waouh, I m very very satisfied as you understood.
all of that needs more analysis...(and time!)
but my project of integrating both SDA and VSSA driven by DPS in a single solution is confirmed today.
good luck for your integration and enjoy the sound
this is a nice shining day here on the east side of the atlantics
this is the DPS+VSSA "in situ" this morning
An externally hosted image should be here but it was not working when we last tested it.
The first very good news , is that I cannot here any sort of noise in the tweet and comp. the DPS is clean and the PSSR of the VSSA is good. no need for additional coil or whatso ever fancy caps. no zzzz or chhh or fffff
this is the first 30' of sound so this is not possible to give any judgment of any kind, either for the combi VSSA-DPS or for any comparaison between SDA and VSSA if anyone wanted that, sorry
let me say the music is just Good, so good. Well, very conventional I d say. soft, cool, nice, that doesnt rock as the first try with the DPS-SDA, something different, here. bass very good, but not as tight and powerfull as SDS (yet?).
Voice/mids less brillant, more soft but sill good details.
well. I must stop otherwise I would start judging things which cannot at this stage
for those questioning VSSA with DPS, I feel very very good with this combinaison (compared to my DIY trafo 1200VA classA/B
). Still the 1000uF onboarded on the VSSA PCB might have a serious impact on sound.for those questioning SDA vs classA/B, waouh, I m very very satisfied as you understood.
all of that needs more analysis...(and time!)
but my project of integrating both SDA and VSSA driven by DPS in a single solution is confirmed today.
good luck for your integration and enjoy the sound
Hi Guys,
Good News.
MDA-400 arrive from our services (all smd parts assembled).
Some parts of the custom design case,as cover,rear panel arrived. (both version,Dual Mono Integrated as showed in photo,and for Dual Mono single case (168x60x240)mm.
This in photo, is Blue Cobalt opaque. available 6 colors pastel opaque.
Well, tomorrow arrive first qty of Nichicon audio grade caps (full set),then start assemble and final test.
Availability for this Kit = 40pz.
MDA-400 Integrated Dual Mono complete Kit.
Professional high quality, it's a delicius amp with Modern high style case, goes well with stylized décor of your home,instead of old iron case I think.
Well, 1 year for realizze this case, as some already know. but I'm tubborn.
You can see aspect of rear panel complete, in some photos in thread.
--------------------
Then, this series MDA-400 at 58V with full Nichicon audio grade- deliver quiet 2x520w rms at 2R.
Behavior is typical of large Class AB, in warm sound and high current on the load (up to 22A repetible).
-------------------
The case includes:
Top / bottom cover with logo in Perspex materials AudioPower
N-4 feet AL (made on a lathe) + cathcu pins High grip
Rear panel complete with high-end components certified
N4 grills matt black (for the slots of the air flow)
Front panel, 10mm thick, rounded corners, with logo AudioPower.
N-2 side profiles AL & magnesium surface.
--------------------
Reservation needed for this kit. The next amount we can get at May June. Considered amateurs waiting, mostly from Italy.
Also, I can not guarantee that the bid price, can be repeated.
Designed and made in Italy
The complete Kit,not require iron solder.
If interested, please create a list, I think we need 10 days.
Regards
Good News.
MDA-400 arrive from our services (all smd parts assembled).
Some parts of the custom design case,as cover,rear panel arrived. (both version,Dual Mono Integrated as showed in photo,and for Dual Mono single case (168x60x240)mm.
This in photo, is Blue Cobalt opaque. available 6 colors pastel opaque.
Well, tomorrow arrive first qty of Nichicon audio grade caps (full set),then start assemble and final test.
Availability for this Kit = 40pz.
MDA-400 Integrated Dual Mono complete Kit.
Professional high quality, it's a delicius amp with Modern high style case, goes well with stylized décor of your home,instead of old iron case I think.
Well, 1 year for realizze this case, as some already know. but I'm tubborn.
You can see aspect of rear panel complete, in some photos in thread.
--------------------
Then, this series MDA-400 at 58V with full Nichicon audio grade- deliver quiet 2x520w rms at 2R.
Behavior is typical of large Class AB, in warm sound and high current on the load (up to 22A repetible).
-------------------
The case includes:
Top / bottom cover with logo in Perspex materials AudioPower
N-4 feet AL (made on a lathe) + cathcu pins High grip
Rear panel complete with high-end components certified
N4 grills matt black (for the slots of the air flow)
Front panel, 10mm thick, rounded corners, with logo AudioPower.
N-2 side profiles AL & magnesium surface.
--------------------
Reservation needed for this kit. The next amount we can get at May June. Considered amateurs waiting, mostly from Italy.
Also, I can not guarantee that the bid price, can be repeated.
Designed and made in Italy
The complete Kit,not require iron solder.
If interested, please create a list, I think we need 10 days.
Regards
Attachments
Last edited:
Hello Fabrizio, sorry if I did not answer, but they are pretty darn busy.
Ah .. you're the perfect man for testing hard (long wires, without a metal base for the heart).
But this is good to test instability, and induced noise.
As you know, full-range, it is obvious that a smps DPS-400, for each amp, it is very much better.
well, it should come out, even some tests from Pinnocchio , Also interesting because made at 120Vac 60Hz.
Ah .. you're the perfect man for testing hard (long wires, without a metal base for the heart).
But this is good to test instability, and induced noise.
As you know, full-range, it is obvious that a smps DPS-400, for each amp, it is very much better.
well, it should come out, even some tests from Pinnocchio , Also interesting because made at 120Vac 60Hz.
Hi,
Single Mono-Block case version.
Also, we present the new professional Guitar Amp 100w 8R. 20Hz to 22Khz, 0.03% THD @ 100w.
Compared in Studio Vs. the best in the world Guitar Amps.
Wait for A-600 complete Guitar Bass, powered by DPA-600/F.
regards
Single Mono-Block case version.
Also, we present the new professional Guitar Amp 100w 8R. 20Hz to 22Khz, 0.03% THD @ 100w.
Compared in Studio Vs. the best in the world Guitar Amps.
Wait for A-600 complete Guitar Bass, powered by DPA-600/F.
regards
Attachments
Last edited:
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